Dumping mechanism for farm vehicles



Jan. 10, 1950 1.. R. JACOBS ET AL 2,493,877

DUMPING MECHANISM FOR FARM VEHICLES Filed Sept. 24, 1947 2 Sheets-Sheet 1 0 2/6 /2 32a 3\9 6 3 5O 4/ 53 llfi/l/l/l S A //l I i I I! 0 6.4 o 60 32 Q 1 x I 04 )6 e5 a 9 2e 2 [/2 55 54 57 75/5 58 2/ 25 IV 1 /7 73 g] wuowIc r Leroy R. Jacobs 171933 GuyR.HaZzrma7r abtymm Jan. 10, 1950 L. R. JACOBS ET AL DUMPING MECHANISM FOR FARM VEHICLES 2 Sheets-Sheet 2 Filed Sept. 24, 1947 Lnrog E. Jacobs Guy 'HQHaZierman ablomm Patented Jan. 10, 1950 .DUMPJNGzMECHANISM/EOR-FABM XEHICLES Leroy R. 213106115 'and Guy Rffliltermain,

'Yellow spiiinggiflhio .Applicationseptemher 24, rs imserial No. 775312 .This invention relates to dumping vehicles and particularly to "am'echanism for the tipping of a vehicle'body, such as a wagon'bed,relativeto the running gear and chassis. It comprises an "improvement over the dump bed construction 'for vehicles of our co-pending application for Letters Patent, Serial No. 752,420, filed by .us --.on June 4;, 1947.

Although the mechanism of our invention is adaptable to many types of vehicles -it is oiparticular usefulness in the case of "farm wagons. Where a'liftingdevice is .carriedby a chassis,.-and is designed tolift therefrom the vhiclelbody, it is vnecessarylthat the chassis'be sufiiciently. rugged to withstand the strain. In the case of .farm wagonsfhowevenit is desirable tohave the underparts .as light .as possible to .keep the overall weight within reasonable "limits .and to,provide-a degree of flexibility when ltraversing uneven round.

' .An object of the .present invention, therefore,

is to provide a lifting mechanism ifor .the tipping of ,a wagon .bed which will react, .not upon the wagon chassis, but .upon 'the ,grounditself.

Anotherobject .to .provide such a lifting mechanism -in.as simple aformaspossible, without using ,gearing, screw threaded members, or nicely fitted bearings, all of which necessitate frequent attention when exposed .to the elements. 'ZIYhese .objects we accomplish 'by .the provision of a pair .of rigid .struts, the lower .endsof which are :adapted torest upon .the ,ground and theup per .ends 'of which carry .rollers which .coact .with trackways beneath .the wagon bed. .Theseupper endsmay be moved forcibly, by ablockand .tackle device, .rearwardly .irom an idle .position at the forward .end .of the bed. As the .struts assume an increasingly vertical .position they forc .the forward end .of .the bed upwardly, thus raising the bed .about its .pivots at the rear of the chassis until the desired=dumping angle .is reached.

.An ancillary...object is to provide adjustable means whereby the height of the. horizontal wagon bed..and its rearward pivots, maybe .chosen either to-conform t-o thatof .a loading platiorm, to=clear a certain height .of growing crops, .or to raise-the rear end, when in dumping position, abovela particular load receiver.

.(Dther objects and advantages will be made apparent .by the following specificationand claims and zbythe appended drawings.

In the drawings, Rig. .1 is.-a. longitudinal, medial section through a farm wagon incorporating the dumping.mecha nism of tlriisinvention; o

4 Claims. (013398- Fig. 2 is a Slide -levational view "of "the same; with fihe wagon 'b'ed raised to dumping-position;

Fig. is a transverse, vertical section on theplane 33'of Fig. 2

Fig. 4 is a. "similar *section taken 'on the plane 4- 4 of Fig." "2 =and omitting parts beyond the plane; and

Fig. '5 15 a view similar to Fig. 2 but showing the telescopic chassis supports extended to "elevatetheposition-of thepivotalsupport.

In the drawings a preferred embodiment (if our "invention is illustrated as "applied to afflate bed "fa-rm wagon. The wagon comprises 'a bed I' l] pivoted at H on 'a chassis H, "the =latter being provided with front and :rear wheels 13 me lflgrespectively.

'Theparticular 'ilesign (of "the chassis is 'of little importance to the jinvention except inso'far as it provides the pivotal support H ."for the bed, a cross-bar l5, and extensible members flffi "as will later be described. In the chassis illustrated, front 'and'rear cross-members 'l1 and i|8,. respeci tively,.:a're interconnected with a thrust tubeiljlj Bearinghousings 2'0 'forthe rear axles are rigidly secured to the cross-member 18 while those' for the front axles are pivoted caster 'fashionlat 21 ion the cross-member "l1.

.A wagon tongue "25 .is pivotally secured, at 23 to the member 1 7 andjisinterconnected with the dir'iglble front-axles inany well known manner.

.Agpair o'f.longitudinal, bed-supportingsills .are

provided by channelsifl which .are carried .bythe previously mentioned extensible members J5. Each of 'thesellatter, as'bestseen in Figs. Sandi,

- comprises .a pairoiitelescoping members, preferably cylindrical, the lowerof which, shown atjrl. is rigidly secured at .one :ofthe outer rends of cross-members Ii! .or .I 8. The :upper member (32 of each .pair is \detachablysecu-red, as byabnlt 33, near an end of oneof thesillsand-may be held at any selected position, relative to the .lower member, .as .by .bolts 31 which .may occur; ofa :series of holes through the-parts. .lnitslower positions the inner member 32 may pass; through an opening in the cross-member :lr'l l8 into the hollow interior, as shown :Eig.

If a.-given;length of member 32 'issinsuflicientfio provide a desired height 10f sill, it may @be ::re-. placed lama larger one.

The abed construction .is likewise immaterial to the :invention, beyond the provision ofra'rpan'. of longitudinal stringers which provide jftraokways viorthe lifting mechanism and it-he rprovision of a bearing support for. a:se'trofrsheaves.. wagon {hedrillustrated moorboardsifli M- extending jflanges of the angle-irons ifl lie immediately adjacent the webs of the respective sill channels to prevent relative transverse motion I of the bed and chassis. Guide plates may be of the descending bed.

The pivot pins II are conveniently carried in;

p15- to the sills and stringers, respectively, asseen r 'Figs.2and3.

To raise the bed about its pivots l I we provide bearings 42 and 43 welded or otherwise secured wardly to an anchorage 58-on the front cross-p.

member i of the chassis and thus limit the rearward positionof the lower strut ends.

i With' the struts supported and pivoted upon the ground, the bed may be raised and lowered by altering the position of their upper ends along thews tringe'rs. A block and tackle arrangement is provided to produce the relative movement. ll'or this purpose a .set oi sheaves 60 iscarried we shaft Bl mounted 'in hangers'62 on the stringers, the great iorce exerted upon them be: ing" transmittedto, the. stringers by braces 63. A" pilarfset of sheaves 64 is carried by thestrut crfos s" f e d A' cable :65 is anchored tojoh ojthe'fsha'ft'sand reeved about the sheaves. The cablethence passes rearwardly to a pulley 66'- c'a'rrid bythe chassis member [8 and again for-f wardlyito' an appropriate power source.

Means are provided to raise the struts'ffrom theground so as to clear the terrain, when the bed is returned to horizontal, transporting positi'onQ'This is the function of the cross-bar '15, previously mentioned. The bar is carried, as best seen' in Figs. 2 and 4; byde' pending brackets, selectively positionablelonithe sills 30 and bolted thereto s at 11. As thecable s5 is. paved outandthebed is allowed to descend, thestru't's 50 :fa's'sume a' smaller and smaller angle to the horizontal until,- just' before, the bed beams 39 reach the sills 30,-the struts engage the :bar i5, Continued desc'entof the heavy bed then rocks the struts on the bar and raises the lower ends to the po'sitionillustrated in Fig, 1.

'1 At" the start of a subsequentdumpingoperation the initial-raising offthe bed'is accomplishedb'y a pivoting of the struts'aboutthe'bar' I5: Were thebarat asuffi'cien't height to engage thebod'y or the struts thems'elv'es, an exhorbitant amount of force would need to be applied to the sheaves quent mechan'i'cal disadvantage. We haveither'e fore, provided extensions l5on the strutswhich cable'fiii attached thereto.

angle increases until, at the broken-line position in Fig. 2, the shoes 55 engage the ground. The extensions, at this time, withdraw from the bar I5 and the struts thenoeforth pivot upon the shoes.

It will be noted that when the sills are raised on the extensiblesupports 16, the bar 15 is carried with them. To maintain its point of engagement with the extensions at an advantageous position, the brackets 10 are made adjustable V v along the sills as previously mentioned. provided on the sills to ensure proper'positioning f; fWhere the Prime mover is a tractor,

- ample, provided with a winch, the wagon may be lefthitched and. the winch used to pull the cable. In the usual case, however, the prime mover, whether horses or vehicle, is unhitched and the The wagon wheels are then chocked, as at 18 in Fig. 2, and the prime mover driven ofi to pull the cable and effect the dumping.-

It will be understood that the embodimentillustrated andldescribed is chosen as an example only and that numerous changes and modificatio'risniay be made in the dumping mechanism without departing from the spirit and scope of our'invention.

"Weclai'm: V l ln a vehicle having a chassis, a 'body, -and a" pivot therebetween, a dumping mechanism for thejbody comprising astrut," means for pivoting on end of the strut on the ground forwardly of the'pivot, means for forcibly sliding the other end'of the strut along the bottoml of thebod y irom the forward end thereof and forjjallovvingthe'wei'ght of the body to return the said other end to the said forward end, an abutment carrie'd' by the chassis across the downward path oi the Strlit'vvhereby the strut is rocked thereon to-lift the first mentioned end from the ground during the final portion of the body es ent,

2. Infa vehicle: having a (chassis, a body, and

a rearwardly "positioned pivot therebetween, a

- b'e'cause' ofthe low 'strutangle and-the conse- V ground forwardly of'the pivot,'means for forcibly theefiective-strut angle is in this manner' increased, resulting ina'decrease in the initial mechanical disadvantagei ath'e Eliiting sop'erationprogresses, *the strut dumping mechanism for the body comprising a strut, means for pivoting one end of the strut on the ground forwardly of the pivot, means for forcibly sliding the other 'end of the strut along the bottom of the body rearwardly from the for ward end thereof and for allowing the weight'of the body to return the said other end to the said; forward end, a surface on'the strut intermediate" it's ends and displaced forwardly a substantial distanceirom a line joining the ends,,an abut; ment 'on the chassis adapted to lbe engaged by said surface during the latter portion of the body return and during the initial portionof th body lifting; whereby the strut is rocked about the abutment to lift its said one end from the ground;

and "whereby substantial moment arm ob tained' ior the initialforcible sliding of the said ther d movement of the said one end. "*3. A"dumping vehicle comprising a body," a?

' chassis; a body support, a pivot between the body I andsupport, extensible means'for mounting the support onthe chassis whereby the 'height -of? the body and pivot may be=adjusted,afstrut;

means for pivoting-one endof thestruton the sliding the other end of the strut alongthe bottom of the body from the forward end thereof and for allowing th body' weight to'returnthe said other end to the s'aid forward end, anabutment intersecting the downward path of *"th means .for limiting rearward strut whereby th strut is rocked thereon to lift the first-mentioned end from the ground during the final portion of the body descent, meaiis for limiting the rearward movement of the first mentioned end, and an adjustable mounting for the abutment on the body support to compensate for adjustments in height of the latter.

4. In a vehicle having a chassis, a body, and a pivotal connection between said chassis and body providing for swinging movement of the latter in a vertical plane, at raising and lowering mechanism for the body comprising a strut having a lower end adapted for engagement with the ground during body raising and lowering operations, a tension member tying the ground-engaging end of said strut to one end of said chassis forwardly of its ground-engaging end, a longitudinally extending guide fixed to the bottom of said body and in which a normally upper end to said strut to cause swinging movement thereof,

about its ground-engaging end, whereby to raise and lower said body.

LEROY R. JACOBS. GUY R. HALTERMAN.

REFERENCES CITED The following references are of record in the file of this patent:

FOREIGN PATENTS Country Date Great Britain Dec. 8, 1937 Number France of 1923 g 

